thumb safety install norinco 1911
hi guys I just bought a chip mccormic extened thumb safety. it states may require some fitting. I am mechanicaly inclined but new to 1911's I do all my own work on S&W and colt revolvers. I was planning on putting this on my nork 1911. I willing to bet I will see what need done when it arives. but I am courious what all is needed to fit the safty? the only thing I can think of is maybe the pin might be slightly larger and need fitted. what else need done. any tips on fitting it. thanks guys